01 - Preheat oven to 350°F. Grease and line an 8-inch round cake pan with parchment paper.
02 - In a large mixing bowl, whisk together gluten-free flour, baking powder, baking soda, salt, ground ginger, cinnamon, cloves, and nutmeg until evenly distributed.
03 - In a separate bowl, whisk together applesauce, brown sugar, vegetable oil, maple syrup, eggs, vanilla extract, and orange zest until smooth and fully combined.
04 - Pour wet ingredients into dry ingredients and stir until just combined, taking care not to overmix the batter.
05 - Transfer batter into prepared cake pan and smooth the top surface with a spatula.
06 - Sprinkle chopped crystallized ginger over the batter surface if desired.
07 - Bake for 35 to 40 minutes until a toothpick inserted into the center comes out clean.
08 - Allow cake to cool in pan for 10 minutes, then transfer to wire rack to cool completely.
09 - Dust with powdered sugar before serving if desired.